Book back for loose-leaf books



April 2 1929.

J. SCHADE BOOK BACK FOR LOOSE LEAF BOOKS Filed March 21, 1928 E'i =l Patented Apr. 23, 1929.

I UNITE -'r JOHN SOI-IADE, or HOLYOKE, MASSACHUSETTS, assi'en'on To NATIONAL BLAitK BOOK ooMranY, or HOLYOKE, MASSACHUSETTS, A VOLUNTARY TnU-S ASsocrATIon or comn'rnnasnrr navrne AS TRUSTEES r. e. TOWNE, n. TownnfJ. M, Towns,

v Ann F; W. WILSON,

oon BACK Fen LoosnLnAr BOOKS; v

Application filed March 21,

2 ceedingly tough, and can be made in any suitable color and external pattern. S

This back is preferably made, from what 'is ,known as vulcanized fiber but can be made from any suitable fibrous material.

A detail description of the invention fol-. lows which is to be read in connection with the drawings herewith furnished, and in which V Figure 1 is a plan View illustrating one form of the completed invention Figure 2 is a plan View illustrating another form of said invention- I Figure3 is a section at the line 33 of Figure 1 I Figure 4 is a section at the line 4-4 of Figure 2 v Figure 5 is a detail elevation of the loose leaf structure fastening means employed in the construction shown at Figure 1 Figure 6 is an elevation of the loose leaf fastening structure employed in the construction shownat Figure 2- Figure 7 is an end elevationof the structure shown at Figure 5 and the fiber back vulcanized fiber, which, prior to any ope-rations thereon, is flat and of thevdesired width and length, as shown at Figures Tend 8.

In making a'book back to be used incon nection with loose leaf books, the back must be provided with means whereby a loose'leaf structure' may be securedthereto, and the usual means employed in this connection is: an elongated eyelet orrivet. In the, present invention an elonga-ted'eyelet 2 is used, which at its lower endis headed to a basethe latter having downwardly projecting prongs or similar members which are driven into the fiber by the application of heat and great pressure. 7 I .c

The drawings illustrate two simple eXempressure that 1928. Serial no. eeaara.

plifications of means for securing the eyelets to. the fibrous material but the invention is byfnomeans limited to the employment-of these particular means, since the eyelets, in-

stead'of being headed-t0 a separate means that has depending projections or analogous 2 devices, may be formed integral with such" means and t is merely necessary inthis con-.

nection that the eyelets or rivets and the ture.

securing means is concerned, is shown at Figures 1, 3, 5, 7 ,and 8, and in the construefastening means be a quasi integral struc tion shown inthese figures the eyelet 2 is headed to a circular disk3 thathasfldepending from its periphery prongs 4, and when the strip of fiber with these disks assembled thereon in proper positiomas shown at Fig-' ures 7 and 8, is placedw-ithinthemoldand heat and great pressure applied, theseprongs will be driven within. the fiber, and asthe fiber adapts itself to the mold under this heat and great pressure, it will become 1concave-convex in cross section, and since the firmly grasped therein and will be bent out laterally during this concavo-conveX formation, as shown at Figure '3, thus securely an choringthe eyelets within the fiber.

Referring to the construction shown at Figures "2, 4, and 6, the eyeletsare he'adedtov a rectangular plate 5, and two opposite edges of'the latter are turned downwardly as shown at '6, and when'heatland great pressure are i applied, these parts 6 will be forced into the I fiber, andas the latter is rendered concavoconvexin cross section by the continued ap-i phcation of the heat and pressure, these parts 6 will be distended as shown at Figure 4,v 1

thus firmly anchoring the eyelet to-tliclfiber.

It is to be noted that, if the parts 4 and 6" were not spread the eyelets would 'not be anchored, and the inventor herein-liasmade the material-is rendered concavo-convex in cross section, as above noted, these parts 4 and 6 will diverge and therefore afford a firm;

anchorage for the eyelets.

WVhile heathas been 'speclfied as one of the agents'used, in the making of this book back,

it isnot absolutely necessary to employ heat in this connection, although When it is em bring about the results hereinbefore described but Will consume more time in the absence of heat. V a

hat is OliililQCliSZ-r I 1. A back for loose leaf books made from a hard fibrous material having loose leaf structure-fastening means embedded and anchored therein by the application of: pressure.

thereinunder pressure for securing thereto a 2. A back for loose lea-f booksycompr-ising a hard fibrousmaterial, means embedded hereto.

base portions therefor having downwardlyextending parts, said base portions being embedded 1n sald material underthe applioation of pressure, said material being formed by said pressure into a concavo-convex' shape in cross section whereby the eyelets are an-' chored thereln.

" In testimony whereof IaffiX my signature i JOHN SCHADE. 

